Question

What Article Should we use on Sun is it "the sun" or *a sun*​

Answer 1

Answer: the sun.

Explanation:

We don’t have any other stars that we call, The Sun, or sol.

If we finally got galactic travel, the solar system would be known as Sol. While other places had names like NG-325, etc.

Answer 2

Answer: The sun

Explanation: "The" article is always used on celestial bodies for example: the earth, the moon etc.